Fallen Earth was actually released back in late 2009, but for some reason I only noticed it on Steam recently. It was free-to-play and looked pretty cool, if a little derivative of other post-apocalyptic RPGs (the Fallout 3 comparisons are inevitable), so I downloaded it.
The game drops you in the American Southwest in the year 2156, among other remaining survivors of something called the Shiva virus. It combines first-person shooter style ranged combat with melee combat, and glues it all together with a familiar MMOPRPG questing system. As a whole, it actually works quite nicely, and I was surprised to discover that despite the FPS element, latency was seldom an issue.